Haloo kak, tolong bantuin yaa, terimakasihhhhhhhhhhhhh​

Jawab:

vektor kesamaan
persamaan linier  dua variabel

a =  (3, -4)

b = (- 1, 1 )

c = (2, – 1)

jika  x a + y b = c
x(3, – 4) + y(- 1 , 1) =  (2, – 1)

3x – y = 2
-4x + y = – 1 ___(+)
-x =  1
x = – 1

3x – y= 2
3(-1) – y= 2
-3  -  y =  2
y =  -3 – 2
y = – 5

nilai xy = (-1)(-5) = 5